Leaf-turning device



Patented Apr. 26, 1921.

2 SHEETS-SHEET 2.

ATTORNEY UNITED STATES OLOF WILLIAM OLSON, or

PATENT ()FFICE.

LEAF-TURNING DEVICE.

Specification of Letters Patent.

Patented Apr. 26, 1921.

Application filed July 1'7, 1919. Serial No. 311,646.

To all whom it may concern:

Be it known that I, OLOF WILLIAM OLSON, a citizen of Sweden, and a resident of New York, in the county and State of New York, have invented a certain new and useful Leaf- Turning Device, of which the following is a specification, the same being a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to devices whereby the leaves of a book, etc., may be readily turned over consecutively, and in the present example it resides in an apparatus designed for turning over the various sheets of a book, etc., the edges of alternate ones of which are preferably notched in a staggered relation so that the cut out portions of each alternate leaf shall lie one beneath the other-although separated by an intervening leaf-and the notchesof the intermediate sheets shall also lie under each other, but located at one side of and at a distance from the first series of notches. It is obvious, however, that the device embodying the present invention may be used with books, etc., the edges of which are not notched.

The device described and illustrated herein is, broadly speaking, an adaptation of the invention disclosed in m Patent No. 1,196,47 6 issued August 29, 1916. It differs, however, from the same in certain features of construction and operation. In each instance the invention comprises a rack to hold the book, ete., or sheet music, together with mechanism for turning over the leaves of the book and a support for the whole, as a stand located near an instrument of music as set forth in the said patent, or the instrument of music itself as hereinafter described.

In the drawings which accompany and form a part of this specification, illustrative. of one embodiment of the invention, Figure 1 represents an elevation of a music rack and the mechanism for turning over the leaves of a book supported thereby; Fig. 2 is a side elevation of the same; Figs. 3 and 4 are views in detail of the expansible arm and finger carried thereby; Fig. 5 is a plan view of a book having the leaves thereof notched; and Fig. 6 is an elevation of a piano forte equipped with my invention;

Like numerals of reference indicate like parts in all the views.

Referring particularly to the drawings, 1 denotes a suitable support, the same bcing in the present example a movable panel. in the front of a piano forte to which a plate 2 is held in any convenient manner, as by clamps 3, which plate supports the music rack 23. A shaft 4 is carried by the plate 2 which shaft is preferably made adjustable in length as by the use therewith of a sleeve 31 forming a part thereof. An arm .6 extending outwardly from thesaid shaft is connected with a link 8 by means of a joint 7 the movement of the said link being governed by the operation of a pedal 9.

The shaft 4 also actuates a segment 10 which operates a gear 11 the hub 12 of which supports a relatively stationary tube 15. Within the latter is located an arm or tube 16 inclosing a rod 17, the said rod andtube 16 being adjust'ably connected by a thumb screw 14 working in a slot 5 formed in the said tubes 15 and 16. The length of the arm or tube 16, which works telescopically in the tube 15, may be varied by manipulating the screw 14, and when the arm 15 is extended the desired distance, the parts may be fastened together by the screw which enters the rod 17 and the hub of which engages the edges of the slot 5 formed in the said arm 16, the position of the rod 17 being controlled by the screw at the end of the link27.

The hub 12 also carries a plate 13 in which is journaled a four armed wheel 18 which has an interrupted rotary movement and is held in either of its positions when at rest by a spring 19 which rests against a square edged portion of'the hub of the said wheel. A link 27 connects the wheel 18' and the rod 17 so that upon a partial rotation of the said wheel, the rod 17, and consequently the extensible arm 16, is moved outwardly or inwardly as the case may be. At the end of the arm 16 is located a vibratory finger 28 which turns on the arm as it moves back and forth and is held when free from contact with the sheet of music in a median position (or pointing toward the piano when the arm 16 is vertically disposed at its median position) by means of opposing springs 29 and stop 30.

WVhen the parts are in the position shown in Fig. 1, a pressure on the inner portion of the pivoted pedal will pull the link downwardly and cause the shaft 4 and segment 10 to be turned, thereby partially rotating the gear 11, the wheel 18 and the arm 16, the finger 28 in the meantime (which lies against the right hand leaf of the book 24) entering the notch 25 and turning the leaf over as the arm 16 moves to the left. When the arm 16 assumes a vertical position the finger 28 will be free to turn owing to the different inclinations of the plate 2 and rack 23 and will be turned by the springs 29 so as to be at right angles to the rack. A further movement of the arm 16 toward the left will cause the finger 28 to be moved by impact with the sheet of music so as to point toward the center of the book and to lie against the left hand sheet and adjacent to the notch 26 of the book 24: at the completion of the left hand movement of the said arm.

During the said movement of the arm 16 the longer upper arm of the wheel 18 will engage a stationary spring dog 20 and thereafter the adjacent shorter arm of the said wheel will contact a stationary spring dog 20, the effect of which will be to cause the wheel 18 to make a partial revolution and thereby draw the arm 16 inwardly a sufiicient distance by the link 27 for the finger 28 to register with the notch 26 of the new right hand leaf of the book 241, at such time as it shall be moved to its original position again.

Upon pressing the heel on the pedal, the arm 16 will travel in a right hand direction back to its original position without turning or interfering with the left hand leaf (as it is now too short to engage the notch 25 of the turned over leaf) and also without moving the four armed wheel 18, as the arms of the said wheel pass by the dogs 20 and 20 on account of the yielding of the springs 32 of the said dogs. The extent of the right and left hand swing of the arm 16 is respectively governed by the adjustable stops 21 and 22.

It is noted that the book has notches cut in the edges of each alternate leaf at the lower corners thereof, and notches cut in the intermediate leaves spaced at a distance from the edges thereof, whereby the pivoted arm will alternately pass across the lower corners of the leaves of the book to engage an edge notch and then pass across the leaves at a distance from the edge to engage the said spaced notches.

I wish it to be understood that I do not desire to be limited to the particular use or the exact details of construction shown and described, for obvious modifications will oc- EO our to persons skilled in the art.

What I claim as my invention is 1. In a leaf turning device, a rack, atelescopic arm to move back and forth across said rack, a sup-port for said parts, a rotary idevice comprising a four armed wheel carried by said arm, and a plurality of stationary means to respectively differentially turn the rotary device when the arm moves in one direction and to allow the latter to move in the other direction without turning.

2. In a leaf turning device, a rack to hold a book, a. telescopic arm to move back and forth across said rack, a rotary device comprising a four armed wheel carried by said arm, a support for said parts, a finger carried at the end of said arm and adapted to turn on the same, and means to control the movement of the said finger when free from contact with said book comprising opposing sprin s and a stop.

3. Iii a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a supporting plate for said parts, the rack and the said plate lying in planes at an angle to each other.

4. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a support for said parts, the said arm comprising a relatively stationary tube and an extensible arm working thereinand a rod within the latter, and means to attach the two latter to the adjustable relation.

5. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a support for said parts, the said arm comprising a relatively stationary tube and an extensible arm working therein and a rod within the latter, and means to hold the two latter to the stationary tube inv an adjustable relation, a rotary device carried by said arm and a link between the two.

6. In a leaf turning device, a rack, a telescopic arm to move back and across said rack, a support for said parts, a rotary device comprising a four armed wheel carried by said arm, and a plurality of stationary means torespectively differentially turn the rotary device when the arm moves in one direction and to allow the latter to move in the other direction without turning, and means to actuate said arm comprising a. segment operated by a pedal.

In a leaf turning device, a rack to hold a book, a telescopic arm to move back and forth across said rack, a support for said parts, a finger carried at the end of said arm and adapted to turn on the same, and means *0 control the movement of the said finger when free from contact with said book, a rotary device comprising a four armed wheel stationary tube in an carried by said arm and a plurality of differentially actuated means to lengthen and shorten said arm by the rotation of said device.

8. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a supporting plate for said parts, the rack and the said plate lying at different planes, a finger carried by sald arm, and

means to control the movement of said finger independently of the movement of the arm.

9. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a support for said parts, the said arm comprising a relatively stationary tube and an extensible arm and rod inclosed therein, and means to attach the two latter to the stationary arm in an adjustable relation, a rotary device and connections therefrom to alternately extend and contract the said arm by the continuous rotation thereof.

10. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a support for said parts, the said arm comprising a relatively stationary tube and an extensible arm working therein and a rod within the latter and means comprising slots in the tube and arm and a screw to hold the rod and arm to the stationary tube in an adjustable relation, a rotary device carried by said arm and a link between the two, a segment to actuate the arm, a pedal, and connecting means between the same.

11. In a leaf turning device, a rack, a telescopic arm to move back and forth across said rack, a supporting plate for said parts, the rack and the said plate lying at different planes, a finger on said arm mounted to turn on the arm as an axis so that when in a median position it lies at right angles to its position when at either end of its movement, and means to attach the same to a piano forte.

In testimony of the foregoing specification I do hereby sign the same in the city of New York, county and State of .New York this 2nd day of July, 1919.

OLOF WILLIAM OLSON.

' Witnesses:

AUG. W. ANDERSON, RoB. SOHWARZ. 

